There are so many implausible things about Nashville's Kings of Leon that the band's implausible lyrics are often overlooked. But let's start there, because more than any other contemporary rock act, Kings of Leon write in the key of crazy. "Sex on Fire," the group's first major hit, has a chorus that goes, "You, your sex is on fire/ Consumed with what's to transpire"--a cheesy come-on followed by the warmth of legalese. The Kings' songbook also includes "Pistol of Fire" ("It's gonna tickle/ You're gonna giggle"), "Soft" ("I'd pop myself in your body/ I'd come into your party, but I'm soft")...